The ekpyrotic universe

Details The ekpyrotic universe The ekpyrotic universe

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phdt........18k&link_type=abstract

Thesis (PhD). PRINCETON UNIVERSITY, Source DAI-B 63/02, p. 838, Aug 2002, 79 pages.

Mathematics

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2

Scientific paper

We present a cosmological scenario in which the hot big bang universe is produced by the collision of two branes bounding an extra dimension. The collision may occur only once (ekpyrotic scenario), or may repeat itself periodically (cyclic universe). The model addresses the cosmological horizon, flatness and monopole problems and generates a nearly scale-invariant spectrum of density perturbations without invoking a period of inflation. A prediction that distinguishes this scenario from standard inflationary cosmology is a strongly blue gravitational wave spectrum. Consequences for near-future CMB polarization experiments and gravitational wave detectors are discussed.

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